http://pub.ucsf.edu/newsservices/releases/200702061/
Smoked cannabis reduces pain caused by HIV-associated neuropathy
In a randomized placebo-controlled trial, patients smoking cannabis experienced a 34 percent reduction in intense foot pain associated with HIV--twice the rate experienced by patients who smoked placebo.
"This placebo-controlled clinical trial showed that people with HIV who smoked cannabis had substantially greater pain reduction than those who did not smoke the cannabis," said study lead author Donald I. Abrams, MD, UCSF professor of clinical medicine. "These results provide evidence that there is a measurable medical benefit to smoking cannabis for these patients."
"The beauty of this study is the use of the pain model as a neutral and physiological anchor for pain measurement. Patients' eyes were averted during the measurements and were uninfluenced by expectations. Smoked cannabis was shown to work on the pain system by shrinking the area of painfully sensitive skin created by the model. The response was comparable to strong pain relievers we have studied, such as morphine"
- Karin L. Petersen, MD, UCSF assistant adjunct professor of neurology
The study, published in the February 13 issue of the journal "Neurology," looked at 50 HIV patients with HIV-associated sensory neuropathy, a painful and often debilitating condition that is the most common peripheral nerve disorder that occurs as a complication of HIV infection. Occurring usually in the feet and characterized at times by tingling, numbness, the sensation of pins and needles, burning, and sharp intense pain, severe peripheral neuropathy can make walking or standing difficult.